Added Bing Hybrid Map
Added Open Street Map
Set map selection menu checks (exclusive check)
Handle proper image type otherwise disk caching fails

As this is no longer google specific, renamed everything google to qgc.

Getting sloppy...

It now shows "Show" or "Hide" Status Bar depending on the current state.

- All resources are either under src or under resources dirs
- Removed files top level directory
- Move flightgear files to top level dir

Use default font wherever possible. Where that doesn’t work, use
ScreenTools::dpiAdjustPointSize.

New version using QtQuick along with an experimental Map Background

Since debug console maintains a list of links it needs to use shared
pointers so it doesn’t run into the link delete ordering problem.

Link ids were being used interchangeably with the mavlink channel for
the link. Link ids handed out as a numerically increasing integer. Once
the counter went past MAVLINK_COMM_NUM_BUFFERS all hell would break
loose and cause memory corruption.

More consistent with Qml usage pattern

Also many LinkManager API changes to further isolate all link
management inside LinkManager.

Line chart widget: Auto-force ground time if offset is more than 3 seconds (30% of default view width)

Also converted to new logging category

PrimaryFlightDisplay: Clear up speed label (now showing airspeed and groundspeed separately to avoid confusion) and add vertical climb label